Biodiesel produced from transesterification of triglycerides with alcohol has attracted attention due to its advantages over fossil fuels. Vegetable oil is a renewable fuel that is made from plants, but has too high a viscosity for diesel engines. Biodiesel is defined as mono-alkyl esters of fatty acids derived from vegetable or animal fats that are not toxic, biodegradable, contain oxygen, and do not have sulfur or aromatics like petroleum diesel. The research demonstrated that biodiesel produced from sunflower oil under optimal conditions was of good quality and could be used as a renewable and environmentally friendly diesel alternative.

2. MACROPOSICIONES.
Biodiesel produced by transesterification of triglycerides with
alcohol, is the newest form of energy that has attracted the
attention of many researchers due to various advantages
associated with its usages
Vegetable oil is one of the renewable fuels which have
become more attractive recently because of its environmental
benefits and the fact that it is made from renewable resources.
Vegetable oil has too high a viscosity for use in most existing
Diesel engines as a straight replacement fuel oil.

3. MICROPISICIONES
Several studies have showed that biodiesel is a better fuel than
fossil-based diesel in terms of engine performance, emissions
reduction, lubricity, and environmental benefits
The exponential growth of world population would ultimately
lead to increase the energy demand in the world. Petroleum is a
non-renewable energy source, which means that the resources of
this kind of fossil fuel are finite and would be run out upon
continuous use. Both of the shortage of resources and increase
of petrol price have led to the findings of new alternative and
renewable energy sources

4. Biodiesel is defined as a fuel comprised of mono-alkyl esters
of long chain fatty acids derived from vegetable oils or animal
fats. It is not toxic, biodegradable and available, has a high heat
value, high oxygen content (10 to 11%) and does not contain
sulfurs and aromatic compounds. Biodiesel is a plant derived
product, and it contains oxygen in its molecule, making it a
cleaner burning fuel than petrol and Diesel
Biodiesel from the waste cooking oil contained the highest
amount of FFA content, an average 4.4%. The pure vegetable
oils contained only about 0.15%, which are within permitted
levels for being used directly for reaction with an alkaline
catalyst to produce biodiesel

5. The research demonstrated that biodiesel obtained under optimum
conditions from pure sunflower cooking oil and waste sunflower
cooking oil was of good quality and could be used as a diesel fuel
which considered as renewable energy and environmental recycling
process from waste oil after frying. Therefore, the objectives of our
work were to evaluate the effects of the reaction parameters of
temperature, catalyst concentration and molar ratio of methanol to oil
on the biodiesel yield and to optimize the reaction conditions using
RSM. The properties of produced methyl ester were analyzed and the
quality of biodiesel was compared with petro-diesel.